To block at a proper using time without blocking the using time earlier than an actual used amount of gas, even when using a gas apparatus performing proportional control.
A flow rate 1 is registered following the equation: Qave3-Qave1=flow rate 1 at a timing of T2 after the gas flow rate is changed, and a continuous using time corresponding to the flow rate 1 is set. When the gas flow rate is gradually reduced by the proportional control, and the inequality expressed as follows is satisfied: |Qave3-Qave4|/Qave33% at a timing of T3 (when a flow rate change is small), set determination processing is performed. In the set determination processing, if the inequalities expressed as follows are satisfied: |sum of registration flow rates (flow rate 1+flow rate 2)-average flow rate of this time Qave4|fixed flow rate, sum of registration flow rates (flow rate 1+flow rate 2)average flow rate of this time Qave4, the equation expressed as follows is adopted: maximum registration flow rate (flow rate 1)-{sum of registration flow rates (flow rate 1+flow rate 2)-average flow rate of this time Qave4}=flow rate 1', and the new registration flow rate (flow rate 1') is registered at a timing of T4, and a continuous using time corresponding to the flow rate 1' is set.
TAMITSU TOSHIFUMI
| JPH09304134A | 1997-11-28 | |||
| JP2003302274A | 2003-10-24 | |||
| JP2000230847A | 2000-08-22 | |||
| JPH07151576A | 1995-06-16 | |||
| JP2003194331A | 2003-07-09 | |||
| JP2007170924A | 2007-07-05 |
Sadao Matsumura
Fumio Takino